In Croatia, Vunak families are generally Croats (from Nasice area ), barely Russians (from Djurdjevac ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Djurdjevac area and in Nasice area.
Prevalence
About 40 people with faimily name Vunak live in Croatia today, in 20 households. There were 70 of them in the middle of the past century, and their number decreased by 40 percent. They are only located in four Croatian cities and 5 other places, mostly in Zagreb (10), Osijek (<10), Djurdjevac (<10), Pitomaca in Djurdjevac area (<10), and in Koska in Nasice area (<10).
Outside Croatia
Family name Vunak is present in three countries on three continents. The family name "Vunak " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.